Nailing plug



Allgl 29, 1939- c. W. PRICKETT ETAL 2,171,097

NAILING PLUG Filed oor. 25,'1957 Patented Aug. 29, 1939 UNITED STATES NAILING PLUG Clyde W. Prickett, Los Angeles, and Burton L. Wilcox, Huntington Park, Calif.

Application October 25, 1937, Serial No. 170,878

5 Claims.

Our invention relates to nailing plugs of the kind embedded in concrete structures to afford means for nailing boards or other building mate'- rial to the concrete.

5 It is our object to provide a nailing plug of this kind of very simple and inexpensive construction which is provided with suitable means whereby it may be nailed to a form to be properly supported during the pouring of the coniii Crete and which has parts peculiarly adapted for receiving, holding and adequately anchoring nails driven through strips or boards into the nailing plug for thus fastening the strips or boards to the concrete.

With these and other objects in view, our invention consists in the construction, arrangement and combination of the various parts of our device, whereby the objects contemplated are attained, as hereinafter more fully set forth, 20. pointed out in our claims and illustrated in the accompanying drawing, in which:

Figure 1 is `a side elevation of a nailing plug as sold and shipped.

Figure 2 is a detail sectional view taken on the line 2--2 of Figure 1.

Figure 3 is a. detail sectional view taken on the line 3 3 of Figure 1.

Figure 4 is a detail sectional View taken on the line 4-4 of Figure 1.

Figure 5 is a vertical sectional view of a concrete wall or the like, between form members illustrating one of our nailing plugs in side elevation and secured to a form member.

Figure 6 is a side elevation similar to that shown in Figure 5 with the form members removed and part of the concrete omitted and illustrating the projecting end of one of the anchoring nails, whereas the corresponding projecting end of the other nail has been cut 01T. o Figure '7 is a similar view illustrating in section a strip fastened to the nailing plug.

Figure 8 is an enlarged sectional View taken on the line 8-8 of Figure '7.

' Our improved nailing plug is made of two spaced sides preferably of galvanized metal with a plate or sheet of wood, or other suitable material, between the side members. In the drawing, the side members are indicated at Ill and I I. We shall describe the parts of our nailing plug as shown in Figure 1, for instance, and by referring to the top, bottom and ends thereof. We vwill treat the inner end as the one which is deepest in the concrete in the completed structure. The side I0 has as its top and bottom edges a curled flange I2. The metal is pressed (Cl. 'l2-105) toward the side II at the beginning of each such flange, as indicated at I3. The side II has at the top and bottom edges similar inturned or impressed parts, as indicated at I4, terminated in channel-shaped flanges I5 which receive the flanges I2. The inpressed parts I3 and IL! and the flanges I2 and I5 form what may be called sockets to receive anchoring nails I6.

In the outer end of the plug, the metal of the side is inclined outwardly away from the body of the plug on each side, as indicated best at Il in Figure 3, and terminates in a short flange I8 in a vertical plane (considering the parts as shown in Figure 1) susbtantially at right angles to the sides I0 and II.

I0 'and II is a filler sheet I9 preferably of wood. The two sides I0 and II are correspondingly corrugated from their inner to their outer edges, as illustrated for instance in Figure 3, and of course the Wood ller is correspondingly corrugated. The purpose of this corrugation is to provide better anchorage for the nailing plug in the concrete and also for giving to the nails driven into the nailing plugs between the sides I0 and Il what may roughly be called an S-shape for more rigidly anchoring them. The sockets formed by the flanges I2 and I5 are of such size and have adequate resiliency so that the nails I6 may be conveniently driven into them and will then be frictionally held. Thus we ship our nailing plugs with the nails I6 assembled in the sockets as illustrated in Figure 1. The plug is then all ready for attachment to the form.

We shall now describe the manner in which our nail plug is used. In Figure 5 we have illustrated at 20 and 2| members of a concrete form. Before pouring the concrete between form members, my nailing plug may be fastened to the interior of the form member 20, by putting the anges I8 against the inner face of the form member 2U and driving the nails I6 into the form member. The plug will thus be held in proper position on the form during the pouring of the concrete 22, and when the concrete sets, the nailing plug will be properly embedded and anchored in it as shown, for example, in Figure 5.

As further illustrating a way of using our nailing plug, the forms may be removed from the concrete. This would leave the nailing plug embedded in the concrete with the sharp ends of the nails I6 projecting from the plug and from the concrete. 'I'he projecting ends of the nails may, where desired, be cut off. In Figure 6 we have illustrated one projecting nail end and have shown the other nail with its end cut off.

Between the two sides In Figure '7 there is illustrated a strip 23 of board or the like nailed to the concrete by driving nails 24 through the strip and into the nailing plug. These nails are driven into the wood between the sides l and Il. As they are driven between the corrugated sides Il) and ll, they assume somewhat of an S-shape, as is better i1- lustrated in Figure 8, this distortion thus aiording better anchorage for the nails than would otherwise be had. 'Ihe ller members I9 function to prevent the concrete from pressing V.the .1

sides I0 and Il together during the pouring of the concrete and setting thereof. Of coursey this ller prevents collapse of the sidesI during manufacture, storage and shipment. The ller or core also makes it possible to use smaller nails eiectively. Even where the full size nails' are used, we nd we obtain a better anchorage bythe use of the filler or core. Experience shows that it is not difficult to drive a nail into the plug but it is much harder to pull it out than in the case of the plug not corrugated to distort the nail, as is here contemplated. The spreading of the sides at IT aiords inclined parts which help to guide the nails 2d into place. Where wood is used for the ller I9, the grain is preferably arranged parallel with the length of the anges I8 so that the cut will more readily take the contour of the corrugated sides.

Changes may be made in the detail of the construction and arrangement of parts and in the materials used for making our nailing plug and it is our purpose to cover by claims any modification or construction of materials used which may be reasonably included within the scope of our invention and of these claims.

We claim as our invention:

1. In a nailing plug, spaced sheet metal sides having at their edges telescoping curled portions to form nail sockets and for connecting the sides together in proper spaced relation and having, at one end, portions inclined away from each other terminating in at flanges substantially at right angles to the plug body, the sides' being correspondingly corrugated from end to end and a brous filler between the sides.

2. A nailing plug having a pair of spaced sides, correspondingly corrugated on long curves and having stiiness adequate for distorting nails driven between the sides, the side edges of the sides having formed thereon channel-shaped flanges and being arranged with the channelshaped flanges of one side received in the channel-shaped flanges of the other side, to thus 4secure the sides together in properly spaced relation and to provide friction holding means for nails for temporarily securing the plug to a form. 3. A nailing plug having a pair of spaced sides, correspondingly corrugated on long curves and having stiiness adequate for distorting nails driven between the sides', fibrous material gripped between the sides, the side edges` of the sides having formed thereon channel-shaped flanges, and being arranged with the channelshaped flanges of one side received in the channel-shaped flanges of the other side, to thus secure the sides together in properly spaced relation and to provide friction holding means for nails' for temporarily securing the plug to a form. 4. A nailing plug having a pair of spaced sides, correspondingly corrugated, the side edges of the sides having formed thereon channel-shaped flanges and being arranged with the channelshaped flanges of one side received in the channel-shaped flanges of the other side, to thus secure the sides together in properly spaced relation and to provide friction holding means for nails for temporarily securing the plug to a form. 5. A nailing plug having a pair of spaced sides correspondingly corrugated on long curves and having stiiness for distorting nails driven between the sides, said plug having at its endsI tubelike parts for receiving nails for temporarily securing the plug to a form and for holding the sides in properly spaced position.

CLYDE W. PRICIQELTT. BURTON L. WILC'O'X. 

